Welcome To the Hoffman Amplifiers ForumApril 28, 2026, 01:12:53 pm | ||
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6 Replies
9649 Views |
by DummyLoad |
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5E3 iron specs
Started by rzenc |
43 Replies
20958 Views |
by samato |
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9 Replies
7092 Views |
by Willabe |
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Has anyone built this tone circuit?
Started by Casey4s |
2 Replies
3707 Views |
by PRR |
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3 Replies
4351 Views |
by PRR |
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Best way to add 470k in series?
Started by frank57 |
2 Replies
3603 Views |
by frank57 |
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YSR1 Traynor 67-72?
Started by plexi50 |
5 Replies
5660 Views |
by plexi50 |
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8 Replies
6291 Views |
by guitarhvac |
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Vox Cambridge "re-build" ideas
Started by nateflanigan |
3 Replies
4093 Views |
by TIMBO |
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Line out with multitap OPT
Started by chuggy |
1 Replies
3861 Views |
by JayB |
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Univox U-42 Schematic??? FOUND
Started by jjasilli |
1 Replies
5195 Views |
by jjasilli |
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Jet city amp Problems
Started by frank57 |
12 Replies
11196 Views |
by frank57 |
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1M Pot + On/Off Switch
Started by J Rindt |
7 Replies
5808 Views |
by jojokeo |
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finished Harmonic Vibe-in-a-box
Started by Danskman |
17 Replies
8230 Views |
by Danskman |
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Rattle in my speakers
Started by 67polara |
8 Replies
5438 Views |
by nateflanigan |
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5879 Princeton build
Started by firemedic |
27 Replies
14192 Views |
by firemedic |
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Adding VVR to fixed bias amps
Started by TIMBO |
8 Replies
9288 Views |
by jojokeo |
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Adding a VVR to 18w amp
Started by TIMBO |
10 Replies
7471 Views |
by jojokeo |
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Bias range.. which resistor ?
Started by worth |
9 Replies
11405 Views |
by Jack1962 |
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PT mA rating
Started by Willabe |
28 Replies
14416 Views |
by 67polara |
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5Ar4 wiring twist
Started by Bub |
2 Replies
4005 Views |
by Bub |
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can anyone help ac30/6 problems
Started by bakerlite |
6 Replies
5971 Views |
by archaos |
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6-pin Marshall power switch
Started by firemedic |
3 Replies
4481 Views |
by firemedic |
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BF Princeton Reverb AA764 ?
Started by Willabe |
3 Replies
4594 Views |
by tubeswell |
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16 Replies
7722 Views |
by bluesbear |
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Touchy volume pot in vibroverb build
Started by Norwatt |
4 Replies
5076 Views |
by Geezer |
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crate vintage club 60 power transformer help
Started by bigj |
7 Replies
10817 Views |
by mrm0to |
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4 Replies
7288 Views |
by ernie_jr |
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Link to the tone stacks
Started by Tone Junkie |
6 Replies
5063 Views |
by drumslinger2000 |
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12 Replies
7592 Views |
by moody |
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Tone stack comparison ?
Started by tubenit |
14 Replies
9355 Views |
by jjasilli |
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The quality of "old" caps
Started by Geezer |
41 Replies
14811 Views |
by sluckey |
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New 5C3 Build...
Started by Trevor_Long |
7 Replies
5962 Views |
by Frankenamp |
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12AT7 VS 12AX7 in PI
Started by 67polara |
10 Replies
9755 Views |
by HotBluePlates |
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2 Replies
4053 Views |
by fiftynine |
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4 Replies
4643 Views |
by Fresh_Start |
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Diode Substitution?
Started by samato |
2 Replies
4048 Views |
by samato |
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Power Scaling in General
Started by fiftynine |
6 Replies
5454 Views |
by fiftynine |
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28 Replies
16065 Views |
by phsyconoodler |
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5 Replies
4930 Views |
by FYL |
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7 Replies
4853 Views |
by kagliostro |
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Parallel resister math
Started by Tone Junkie |
8 Replies
5624 Views |
by Tone Junkie |
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Elroy Jetson's Geetar Amp?
Started by DummyLoad |
2 Replies
4823 Views |
by DummyLoad |
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Pin 1 on EL34/kt77 Grounded?
Started by 67polara |
5 Replies
6591 Views |
by FYL |
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My old Heath 2-12 combo
Started by phsyconoodler |
2 Replies
3895 Views |
by Platefire |
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9 Replies
7989 Views |
by Willabe |
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Valve universal wiring
Started by FYL |
4 Replies
4623 Views |
by stingray_65 |
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screen/grid resistor
Started by jeff |
1 Replies
3807 Views |
by sluckey |
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6 Replies
6042 Views |
by FYL |
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8 Replies
6611 Views |
by DummyLoad |
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